Antonio Ezequiel Cardenas Guillen, also known as 'Tony Tormenta,' the highest-profile leader of the powerful Gulf Cartel, was gunned down by Mexican government forces this weekend.

ByNacha Cattan, CorrespondentNovember 7, 2010

A man walks by a banner hung by suspected hit men from the Zetas gang at a pedestrian bridge in Monterrey November 6, 2010. Suspected hit men from the Zetas gang hung messages between trees and over bridges in Reynosa and in cities across northeastern Tamaulipas state, mocking rival Gulf Cartel gang leader Ezequiel " Tony Tormenta" Cardenas' death, who was shot dead by marines on Friday. The banner, mainly in slang, celebrates the death of Cardenas.

Mexico City — Mexico’s armed forces killed one of the nation’s top drug kingpins this weekend, but signs that the death will lead to more violence and turf battles have terrified residents.

Antonio Ezequiel Cardenas Guillen, also known as “Tony Tormenta,” the highest-profile leader of the powerful Gulf Cartel, was gunned down in the northern state of Tamaulipas after hours of street battles resembling urban warfare.

Cardenas’s death comes as Mexico has scored a string of victories against major drug figures over the past year, including the December 2009 killing of Arturo Beltran Leyva, leader of the Beltran Leyva criminal syndicate; the August arrest of the man fighting to replace him, American-born Edgar Valdez Villarreal, known as “La Barbie"; and the July killing of Ignacio “Nacho” Coronel, a top boss in the Sinaloa cartel.

The slaying of Cardenas in effect destroyed the powerful Cardenas family legacy that, at its height, ruled one of the nation's top cartels. But it may have also emboldened the more ruthless and powerful Zetas, formed by ex-military that broke away from the Gulf Cartel and has unleashed beheadings and massacres arguably more brutal than any other drug gang. The group has been tied to the butchering of 72 South and Central American migrants in August.

“The reality is that [Zetas leader] Heriberto Lazcano, 'El Lazca,' is the top guy in Tamaulipas. He and his Zetas will now likely have even more power in the region, and sadly this probably will result in more extortion, kidnapping, and fear for the people of Tamaulipas,” said Malcolm Beith, a freelance journalist and author of a book on the drug war, “The Last Narco.”

Some experts have questioned the government’s method of taking down cartel heads, saying it leads to bloody fights for succession and the splintering of cartels into many crime groups.

"They cut off one head and many more grow back," says Humberto Palomares, a researcher at the Colegio de Frontera Norte (College of the North Border) in Nuevo Laredo, Mexico. For example, Osiel Cardenas’s arrest only led to the eventual split between the Zetas and the Gulf Cartel, according to Mr. Palomares.

Videos of the violence

Video images of the violence in Matamoros, just across the border from Brownsville, Texas, showed civilians scrambling for safety to the background of constant rifle fire and explosions. SUV motorcades raced down empty thoroughfares and blocked passage in cat-and-mouse chases with the military. Four Army and Navy officers lost their lives and a journalist was killed in the crossfire.

Since Friday evening’s showdown, cities in Tamaulipas and neighboring states have been strewn with threatening banners signed by rivals of the Gulf Cartel, Los Zetas. Multiple highway blockades orchestrated by crime groups cut off major access points to cities on Saturday and early Sunday, and locals tweeted about shootouts in their neighborhoods.

Even an Interior Ministry official warned of further violence, saying the brutal Zetas gang could grab territory from a now weakened Gulf Cartel, the newspaper El Universal reported Saturday.

Residents shaken

“No fear here, no fear,” tweeted a Matamoros resident wryly. “They are giving it to each other, and the bullets are raining on my patio. Thank you.”

In other parts of Mexico, a shootout at a gathering in Ciudad Juarez killed 7 on Saturday. Also Saturday, relatives of 18 men captured while visiting Acapulco in September identified the bodies of their loved ones after they were dug up from a mass grave.